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- v H. A. NORDWICK INTERNAL COMBUSTION ENGINE Original F'iledNov- 20, 1919 2 Shets-Sheet l INVENTOR. HenryA.Nordwzla/c BY S ATTORNEY May 24, 1927. Re. ,630 H. A. NORDWICK INTERNAL COMBUSTION ENGINE original Filed Y- 1 19 2 Sheets-Sheet 2 INVENTOR. Henr .Nol'dwllclc ATTORNEY Reissued' May 24, 1927.

i UNITED STATES p p Re. 16,630 PATENT OFFICE.

may a." nonnwxcx, or s'rocx'ron, camroami, sssrenos. r Duran: moron comm, or am rmmcrsoo, cumomwm, a conclusion or NEVADA.

m'rnnnan-comnusrron Enema.

Original 1n. 1,374,164, dated April 5,1921, Serial Io. 339,279, iuea November 20, 1919. Application for reissue fled-April 5, 1928.

This invention relates to improvements in internal combustion or gas engines, the principal object being to so design and arrange the arts of the engine, particularly one of 5 the our cycle type, that each cylinder will have two power strokes for every revolution of the shaft so that for the same bore of the 1 cylinders and R. P. M. of the shaft, I obtain four times the horsepower obtained lfi lwithfour cycle engines of the ordinary type Iwith an equal number of cylinders, since in this type a power "stroke is had only once for every two revolutions of the shaft. is proportion of power obtains whether I construct a single or a multi-cylinder en- ;gine. I A further object is to devise an engine -which will take up very little space longitudinally, in proportion to, the power developed,'-and in which, by certain features of construction, I am enabled to combine the flywheel with the piston and cam operating means, thus doing away with a separate flywheel, and so .cuttmg down the 2 weight and the total number of parts used.

I also do away with the expensive forged crankshaft. commonly used.

Another'object is to. produce a simple and relatively inexpensive engine, and yet one 80 which will be exceedingly efiicient in its operation.

The foregoing objects I accomplish by means of such structure and relative arrangement of parts as willfully appear from P 36 a perusal of the following specification and claims. v

In the drawings,- similar characters ,of referenoeindicate corresponding Parts in the several views, in which: I

Fi-g. 1 is afront end elevation of my improved engine, half being in section.

Fig.2 is acros section taken one line 2-2 of Fig. 1. i

Referring now'more particularly to the bolts 2. This casing is adapted to be mount ed, by means of ears 3'projecting from the sides, on suitable su rts 4, such as the frame ofYan automo 1le, engine bed of a boat, and the lik 7 Serial No. 680,171.

Projecting centrally" through the casin and turnable in bearings 5 therein, is a she t 6 on which'inside the casing, are keyed a pair of disks? arranged in opposed order and spaced apart a certain distance by reason of their abutting hubs 8 projectingthere between. side thereof and positioned radially from the shaft 6, are. cylinders .9, whose center lines are. on a vertical plane bisecting the space between the two disks 7, and which arepreferably positioned atan angle of to each other. 9

In the present instance I show and describefour cylinders,'all mounted'above the horizontal center line of the casing, but it will be understood that I may emplo any number of cylinders from 1 to 8, without changing in any way the functioning of the engine, or the construction of the co-operating features.

Also, I have shown cylinders having overheadv valves, though the L ofT 'head construction wouldserve equally as well.

Secured to the casing-on the out- Pistons 10 are mounted in the cylinders,

to which istons' are rigidly connected rods 11 extendlng radially in the direction of the shaft 6. The rods are also guided in sleeves 12 formed withpr secured to the inner ends of the cylinders, the connecting members of the sleeves of course permitting a free circulation of air therepast, so as notto form a compression space between them and the istons.

At the lower ends of the rods 11 are trans verse pins 13 parallel to the shaft 6, and

projecting equally on both sides of the rods.

On such projectin ends are rollers 14 adapted to ride in mclosd'd cam ooves 15 formedin the adjacent faces of "t e disks- 7. In order to fulfill the conditions stated as the principal object of the invention, that is, obtaining two power strokes for each linder for every revolution of the shaft, ecam grooves, both of which are manner: v

Each groove is substantially star-shaped, and has four ints"A adjacent the outer edge,of the dlsk, and equally spaced apart,

or When the rollers 14 are at such y .metrical, are designed in' the following points inthe grooves, the piston'B'IO'are then f 1n their heJgi-most position 1n the cylinders.

ate the high or outer oma wi are the inner or low points B of the groove, which arepositioned centrally between the points A. With the rollers 14 at these points; the pistons are then in their lowermost position in the cylinders, the radial distance between the points A and B being equal of course to the piston stroke.

All eight points are therefore 45 apart about the shaft. as an axis, which of course totals 360, or a complete circumference.

Therefore, since the length of a piston stroke is had during thetravel. of the piston rod rollers from a high point in the cam to the'adjacent low point, or vice-versa, there will he eightsuch strokes for every revolution of the shaft, or in other words, two

. valve actuating rods 18 and 19' promoting complete cycles of four strokes each, on

which basis all four-cycle engines operate.

Each cylinder has of cour intake and exhaust valves 16 and 17 respectively, and

radially toward the casing 1, being operatively connected to tappets 20 and 21 slidably and radially mounted in the casing. The tappets have rollers 22 thereon riding on the circular surface of disks 23 and 24 respectively, formed integral with and outside the disks 7, but somewhat smaller in diameter than the latter. ,These disks take the place of the flywheel usually supplied to ve momentum and absorb yibration.

ach of the disks 23 and 24 is provided with a pair of cams 25 and 26 respectively adapted to engage the corresponding tappet roller, since as stated, 'each cylinder functions twice when every revolution of the shaft. 7

cams, transversely, or one Each disk must of course be of suflicient width to accommodate four such pairs of 'res onding valve of each cy 'nder employed, the valve rods and tappets properly alined with their res ect-ive cams, .since the time of opening of '1; e valves of each cylinder isdifi'erent.

An exhaustmanifold 27 may "connect all the exhaust ports.

The ignition-system of the engine I have not shown, since this ma be run from the shaft and. .timed accor ing to the firing strokes of each cylinder in the usual manair for the corthe power obtainable with such an engine I built in the usual manner.

From the foregoing description it will be l readily seen that I have produced such a device as substantially-fulfils the objects of the invention as set forth herein.

While this specification sets forth'in detail the present and preferred embodiment of the invention, still in practice such deviationsfrom such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention, what I claim as new and useful and desire tosecure by Letters Patent is:

1. A four cycle gas engine comprising a' casing, a shaft turnably mounted therein, Q a plurality of cylinders secured to the casing in radial alinement'with the shaft, pistons ,in the cylinders, spaced disks fixed to the shaft, means for movin the pistons in and out with the rotation o the disks, circular extena'ons projecting from the outer faces of the disks, each cylinder having valve tap ets projecting radially toward the shaft and slidably mounted in the casing, and each tappet on a side being in offset 8| alinement from the remainder, and cams cm the extensions positioned to fit 'each tappet at predetermined periods in the rotation of the disks. v

2. A gas engine comprising a casing. a 00 shaft turnably mounted therein, a plurality ofcylinders secured to the casing ln-radial alinement with the shaft and in a common plane at right angles thereto, pistons in the cylinders, spaced disks fixed to the shaft, 06 means for reciprocating the pistons with the "rotation of the disks, valve tappets project- 

